Vulnerability in Linux Kernel
CVE-2023-40791
extract_user_to_sg in lib/scatterlist.c in the Linux kernel before 6.4.12 fails to unpin pages in a certain situation, as demonstrated by a WARNING for try_grab_page.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- lkml.org/lkml/2023/8/3/323 (Exploit, Mailing List, Third Party Advisory)
- lore.kernel.org/linux-crypto/20571.1690369076@warthog.procyon.org.uk/ (Patch, Mailing List)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List)
- cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.12 (Release Notes)
- security.netapp.com/advisory/ntap-20231110-0009/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-40791?
- CVE-2023-40791 is a medium-severity vulnerability in Linux Kernel. CVSS score: 6.3/10. Published 2023-10-16.
- How severe is CVE-2023-40791?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2023-40791 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.